What are the odds of this kind of thing being open source so I can use it at home. So far, most of the "good" text-to-speech systems are all commercial services

And now one is also a service.

I tried using tortoise-tts on my M1. Generating a 7 minute speech took 3 days and, while better than the 15 yr old text-to-speech built into the OS it wasn't close to the quality of the services above. Maybe I don't know who to use it but of course it's not as simple as text-to-speech. You need the system to ideally understand the text it can act out parts

Of course see my username. I want to generate personal adult content so I'd prefer not to upload it to a service.